I am a licensed real estate broker thinking of joining MAR/NAR so I don't think I am breaking any rules here.I don't mind showing available houses for sale on MLS on my website using IDX raw feed like I see most big RE shops are doing.

I have recently purchased a shopping plaza back in November, and I’m trying to get all my tenants all locked up.

Not usually.I did have one case a few years ago where we called the police after the owner stated at her local coffee shop that she poisoned her well.

You might shop lenders and find 0.125% better to rate, but when I shop PMI it's like 0.005% difference, or identical.(2) "We" being my industry, not me personally.

We’ve been picking up those LED shop lights from Costco and plugging them into motion sensor sockets we’ve added above the laundry pairs in the basements, so tenants don’t have to flail in the dark for a pull chain while carrying a load of laundry.

How long do you place a property under contract while shopping it to buyers?

The best example I can give is this: If you hire someone to come to your home and wash your car and you allow them to wash their own car while they're there, although they are technically conducting a "business activity," they are NOT ooperating a commercial business on the premises(which is what the law allows you to prohibit).If you hire that car washer to open up shop and use the property as their brick & mortar where other clients bring there cars to be washed, however, now you're entering into the commercial use arena. 

It has an olde town feel, with cobblestones and quaint shops.

We were shopping for mortgages thinking if it was for the one purchase, it would only count against us once, but that's apparently only if it's in the same 2 weeks, so each inquiry counted against us, especially as lender said we should keep our pre-approval active so they'd pull another credit check every 3 months or so, and we went almost a year before actually finding a deal worth buying.  

@Nicholas Cornford Why not just shop around lenders now and see if they can use the rental income to help you qualify?