My personal residence payments are less than 15% from combined personal income.

Can you convert it back to an Airbnb for additional income and use the proposed rents to offset the mortgage so you can buy your new home? 

Think diversified income, ability to market effectively, no risk of OTA algorithm changes that have negative impacts, etc 

I would recommend buying your first home, either single family or a duplex and house hacking so you can collect rental income and have renters help you pay down your mortgage. 

I have a good credit score, but I'm concerned that given I'm going to have very low provable income for the next 2-3 years and not be able to secure a loan especially with a low down payment.

There is definitely potential to get it lower but it seems like it is going to have to be way lower after considering the expenses that are going to come with it.The entire property has potential to bring in $3,000 worth of rental income if my rent comps are correct.

Utilities, taxes (property, local vacation, & income), landscaping, furnishing / decorations / amenities, pest control, & supplies (soap, TP, etc) are the big ones on my STR calculator that you didn't mention.I'd also recommend using the enemy method to determine expected income.

can do no income no doc at 30% down on the purchase providing 100% of the construction 

Additional streams of income:1) Have mortgage broker present at open house (and charge them "$5000"%) to pre-approve those who want it (but don't make that a requirement to bid).2) Sell the bidder list to other investorsI have not seen any such ads in my area and I'm wondering if it's because this system is not effective or is it because nobody is utilizing it?

Additionally, income from an active business inside of a retirement account will be subject to UBIT (unrelated business income tax), so be sure to consult with a qualified tax professional about the implications.