Your credit, experience and liquidity are the determining factors. 

I assume commercial financing would apply for any 4+ unit buildings, which goes off of the building's finances and not my own.I just know I'm sitting on a decent amount of equity and don't have much to show for it in terms of income or growth potential as it sits. 

we are thinking of having my fiance apply for financing with me and one of the brothers as a partner.

I dont know if i should get a line of credit.

This paragraph does not apply to any delay in occupancy caused by cleaning,repairs, or make-ready items.

She works at the local restaurant and will inevitably need to apply for a place again.

All ARMs are tied to indexes.adjustment dateThe date the interest rate changes on an adjustable-rate mortgage.amortizationThe loan payment consists of a portion which will be applied to pay the accruing interest on a loan, with the remainder being applied to the principal.

Do some shopping around and call credit unions in your area to see which are giving the best rates and who you get a good vibe from.

Without selling, I want to tap into some of it for investing purposes, but I've got the good old favorite DTI hurdle that's preventing me from more easily accessing it from a conventional lender (I checked with a credit union already).

I just started my business with my ein but it takes a bit to build business credit.