Applicant 1 has 509 credit score.

@Jeff G. not aware of that, but sure it's available for a price from Fair Isaac Co or one of the credit repositories.

From an internet search"Unrelated Debt-Financed Income (UDFI) is a tax that applies to an IRA when it uses debt"

I own the property free and clear and i use the equity as part of my business line of credit.

In some cases, federal tax credits like those for low-income housing or economic development might also apply if the project aligns with certain goals.Instead of buying the land outright, developers often lease it from the tribe, which can reduce upfront costs and sometimes come with favorable lease terms.

Otherwise, talk to your bank or credit union.

A quick internet search led to quite a few complaints by people claiming to be ripped off, had deals fall through, or simply getting the run around each time. 

I'm using a property management software (TurboTenant) for rental applications and screening reports, and they charge each prospective tenant $45 for this service.However, the Wisconsin State Legislature states that the landlord can only charge the actual cost of a credit report (up to $25).

Focusing on building knowledge, credit, and some capital is key.

Given your credit score and ability to fund 25% of the purchase I don't foresee any obstacles you will face.