I did notice that the post said most portfolio loans have a higher interest rate typically than what you'd get with a conventional lender, and that they are usually shorter in term or have a balloon payment.Based on my personal situation, I shouldn't have much of an issue getting conventional financing for the first few properties.  

I recently decided to join Loopnet's Premium membership to get my turnaround on empty spaces shorter.

I have definitely seen duplex down condos that have basement ceilings shorter than 7.5ft but still count the bedrooms in their MLS listing.

Potential new payment on additional Versa for myself would be $175 for 3 years (total guess)Is it beneficial to try and trade this thing in on another 2015 Nissan and end up with owing $6000 or so and have a much smaller, shorter payment?

Commercial loans do typically have higher interest rates, shorter amortizations schedules, and balloon payments.

I've been thinking about the pros and cons of longer vs shorter debt, and you've sold me on longer.

You're going to have the first be an attractive rate with a much shorter balloon, 5 years preferably. 5% is not an attractive rate by the way.

If you need to rent on a shorter term, up the rent accordingly.

It all depends on what terms he is offering (seller financing is usually amortized over a shorter period with a higher interest rate).  

Are there shorter term vesting periods than 6months for HELOCs?