All four of the options you outline I believe work in today's market and with the ability to refinance after a rehab, you may be able to break even or cash flow with an improved equity position. 

BP cosigns our ability to operate and vets us both on the phone and online prior to featuring us.

Following up, will this affect my ability to re-fi or do a HELOC/Cash-out re-fi?

In fact, only around 13% of U.S. veterans have taken advantage of the VA Home Loan, which is surprising given its incredible perks—like the ability to buy multifamily properties, no down payment, competitive interest rates, and lower insurance rates compared to FHA loans.

Plus after the 2 years, you avoid capital gains tax on the profit under $500k and get the ability to use your VA loan for your next primary residence. 

Also, ensure whoever you utilize does not have a pre payment penalty or its low so you have the ability to refinance after a year of stabalizing the property.

Thought Rentredi has ACH processing ability and you do not need to tie in your own...?

Or get referrals from other fix-in-flip investors that have the ability to get you good references.  

I am told that there is a 26% tax credit with a new solar project along with the ability to depreciate 87% of the cost of the system in the 1st year.

All that to say, PMLs are usually more concerned with the value of the property and will lend at a lower LTV regardless of ATR (ability to repay) because they know they can take the house for 65 or 70% of the value if you default in a worst case scenario.Hope this helps!