Then, purchase on a 30yr term, 5-10% down conventional, and use your rental cash flow and job income to pay down the HELOC/save up for the next down payment. 

I acquired the units with conventional loans in my name.

That loan size is way too small for a non recourse loan so your loan will need a personal guarantee, but shouldn't need personal finances to qualify for a non conventional loan

Typical conventional loan.

Hey Team,Do any of you have suggestions for building wealth to afford down payments for conventional loans?

Many people transfer the title after getting their financing so that they can get conventional financing in their own name with better terms than the loans available to LLCs.

I'm not sure if there are areas near you with 120k properties, but if so you could get a conventional loan.

MLS and off market sold comps.When I put terms: Cash only on the MLS, it just shows me the listings that include Conventional, VA, FHA, Cash Only.... it shows me the term 'cash only', but doesn't give me what I'm looking for, which the the comps that were really bought cash from investors, not that the term was accepted in the listing. 

I don't think I can count on a conventional loan.

I currently own my primary home, bought with conventional financing.