Last time I looked it was cheaper to pay 20% down and avoid it. 

Otherwise your 7% down payment on $315,000 would go a long way in some cheaper markets, maybe you want to invest in other areas of the country. 

I know it may come out to the same amount of material costs since it is averaged about $3 sqft in my area, but I would assume labor would be much cheaper since it is installed similar to the way laminate flooring would be.On another note, should this be a material I consider when I start to build my portfolio of rental properties?

The trouble i'm having is almost all of the properties i've seen, it would be "cheaper" to rent, and wouldn't touch my capital at all saving the rest for investment properties OOS. 

Three, its much easier, and cheaper, to build out your spaces when you are building the building.

My thought is to take the full amount and eat the cost of holding the loan (hopefully less than a year), since in the long run it will be cheaper than using the line of credit and paying a higher interest rate over the 10 years.

Apparently the single units are cheaper plus you have some redundancy there. 

My sophomore year of college I bought a 4 bedroom house so me and my friends from high school could live for cheaper than paying the steep rent for other run down houses in the college neighborhoods.

Insurance gets cheaper the bigger you get.

Now here is were i will say the PM dropped the ball.1. the gas should have been on and pilot lit before the tenant moved in, if it was just rehabbed it should have been turned on to test and made sure it was working properly, or if there was time in between, the gas should of been off which means the gas company would of had to come out and turn it on and light the boiler.2. the PM should have who ever is taking those service calls be able to walk through a few simple checks before calling a HVAC professional, I would not have the tenant light it, but if I know all that is needed is for it to be lit, I can send one of our handymen out at a much cheaper rate than the HVAC guy.