I have the supply (borrowers) but I’m looking to raise money to fund those mortgages.

If you can withstand the scrutiny (experience, credit and income of borrower and property), that's the way to go. 

A borrower who is paid $14.50 per hour and works 30 hours per week, received __ per month?

Current rents per month: for whole park ~4KFair market rents per month: I'd guess just at > $500/unit and offload the utility costs on the renters, current paid by park ownerDown payment or equity: Expect I could come up with 30% down if neededSource of down payment funds, if applicable: own funds and borrowing from/against IRA/brokerage acctIncome Source: Salaried in telecom construction management for ~20yrsGross monthly income (optional): $5K/moMonthly debt obligations appearing on credit report, plus (if applicable) personal rent and alimony/child support/etc: $3KFICO: Excellent 800Credit issues: just mortgaged a rental property in Feb and cannot yet show rental income history to offset costs.

Current rents per month: for whole park ~4KFair market rents per month: I'd guess just at > $500/unit and offload the utility costs on the renters, current paid by park ownerDown payment or equity: Expect I could come up with 30% down if neededSource of down payment funds, if applicable: own funds and borrowing from/against IRA/brokerage acctIncome Source: Salaried in telecom construction management for ~20yrsGross monthly income (optional): $5K/moMonthly debt obligations appearing on credit report, plus (if applicable) personal rent and alimony/child support/etc: $3KFICO: Excellent 800Credit issues: just mortgaged a rental property in Feb and cannot yet show rental income history to offset costs.

Anything below the 5's in an investment property might be hard to get but I've heard of borrowers that they have but not seen my self. 

A few points: Per the Fannie may guidelines for the “delayed financing exception”, you can borrow up to 75% LTV, OR your initial purchase price (this can include closing costs), whichever is LOWERLots of people have had success with including rehab costs on their HUD / closing statements, so that the second part of the above guideline isn't the limiting factor, enabling a BRRRR-type strategy without having to wait the full 6 month seasoning period.

I have heard (from a hard money lender, so he is motivated to encourage me to borrow hard money) that it's much easier to get the refinance at the end of a BRRRR deal if the property is finanaced for the purchase vs using cash to purchase and rehab a property.  

Years later the borrower is still sitting in that sub-par deal making no one rich but the loan servicing company. 

I've been talking to commercial and conventional lenders and my questions are as follows: Is borrowing in the LLC better, and does this really gain a better write-off potential?