First, you should familiarize yourself with Hawaiian's awards chart:
https://hawaiianair.custhelp.com/app/answers/detail/a_id/2218/~/hawaiianmiles-award-chart
This will give you an idea the range of how many miles you'll need. You'll see First Class
one-way flights from/to Hawaii-East Coast is 40,000 HawaiianMiles for saver fare, or regularly 130,000 HawaiianMiles. Again, this is for one-way,
per person. FWIW, I've never seen First Class saver award fares. I'm not saying they don't exist, but unless you sign up for a service like JuicyMiles or ExpertFlyer to actively look for these saver fares for you, it's very unlikely you'll happen upon them when booking. The chart also lists Upgrade Award amounts, but I've never done this and can't speak to it.
Marriott Bonvoy points do transfer to HA, but as
@wanderlust7 pointed out, it's a terrible value and won't get you very far. About two years ago, Marriott merged its and SPG's loyalty programs and consolidated their credit card portfolios that are split between Chase and Amex. Marriott implemented some very convoluted eligibility rules for each of the Marriott credit cards that have the effect of severely limiting what card bonuses you can get if you have or had one of the other Marriott cards or received one of the bonuses in the past two years. The Marriott card bonuses fluctuate between 75k-125k, but I believe are all currently only 75k. It is very hard nowadays to earn Marriott points in any substantial amount from just credit card bonuses. Say you're able to open two of these cards and are eligible for their bonuses, you're looking at something like 200k Marriott points, which you're thinking about transferring to HA at 3:1 (with a 5k miles bonus for every 60k points you transfer) for fewer than 100k HawaiianMiles. Even if you have a second player involved, a Marriott member can transfer only 100k points to another Marriott member in a calendar year, so it's hard to combine your Marriott points stashes too.
This is all very good advice, especially as it relates to looking at Amex MR cards and the Barclays Hawaiian credit cards. I've posted about HawaiianMiles and Amex MR previously. Just do a DIS search for "HawaiianMiles" by "Lain" and it should pull up my previous posts. My only two edits to the above is Amex typically runs a
25% transfer bonus from MR to HawaiianMiles every year, but I don't think Amex ran one in 2020. And holding a Hawaiian credit card allows you to receive HawaiianMiles from anyone without any fees, so it makes it easy to pool HawaiianMiles from your other players to you or the person holding the Hawaiian credit card who has access to the discounted award fares.
These are the current offers for Barclays' two Hawaiian cards:
https://www.doctorofcredit.com/barclays-60000-hawaiian-airlines-bonus-annual-fee-waived-first-year/ (Not expired)
https://www.doctorofcredit.com/barclays-70000-mile-hawaiian-business-offer/ (Still valid)
Keep in mind the personal card will add to your 5/24 count (this thread has explained that to you, right?). So, it may not be the best card for you or any players if getting more Chase cards matters to you.
Amex MR points transfer to HA, and it's quite easy to accumulate a lot of MR relatively quickly with generous SUBs, "supportal" bonuses from other players using your link to open their own cards, and lots of business credit and charge cards that don't add to your 5/24 count. The 100k or 125k MR personal Platinum is a solid exception to deviating from Chase while you're under 5/24.
If you get deeper into the Amex rabbit hole, the Biz Plat might be worth looking into because if you select Hawaiian as your preferred airline, you could essentially redeem your MR points for HA's cash fares at an effective 1.53 cpp. Some math to consider vs. transferring MR to HA to redeem for award fares.
Similarly, while you can’t transfer Chase UR points to HawaiianMiles, you can use UR to book HA’s cash fares through the UR travel portal (ideally with the CSR’s 1.5 cpp). So if you accumulate a lot of Chase UR, you should compare buying HA tickets with UR as “cash” worth up to 1.5¢/point on the UR travel portal vs. getting the same seats via other methods.