Most answers you’re likely to receive will need a big ol’ “it depends” qualifier.The best, fastest, and most accurate response will come from a quick phone call to several local banks in your area!

I've heard of syndication attorneys having some creative alternatives depending on the number of partners you have on the team so you should consider checking in with one.

Longer answer below :)I'm glad you have vacancy in there, although 3% may be a tad too low depending on your market. 

That will depend on the types of property you have, business operations, and who is likely to make a claim. 

It depends on the market.

Now this may depend on how strict the HOA is, but if the bylaws that you agreed to say no renting, and you rent it, you can potentially piss off the people who have the power to add fines and liens to your property and put up a damn good legal fight.

So much depends on what you agree with the tenants on in the leases.

It really depends on what you are comfortable with, a lot of people will go the commercial route or explore blanket loans if they want to be the most efficient others would pay down some mortgages to mitigate some risk, it depends on what you are most comfortable with. 

It depends on your climate, you might do an energy audit or just switch to electric, it doesn't seem too out of line for four units though $35 ish dollars per month depending on the size of the unit and how much they use the climate control.

It really depends on the market you are in.