It is much easier to start with a simple, functional property, learn the basics, and grow from there.You are on the right track.

My business partner and I purchased a commercial office building a few years ago with creative financing.

Hey everyone,I’m new to REI and I’m wondering if you guys have any advice to share on coming up with rehab estimates when you’re just starting out, and don’t have a long track record to go off of?

Our real estate portfolio included multiple Single Family Residential Flips, a commercial building (office/shop space), and a triplex in Canandaigua, NY.

Quote from @Jake Handler: For anyone that has been a buyer or seller of a seller finance property, what method of payment and tracking did you use for buyer to pay seller monthly? 

Once you cross the tracks into downtown Wilkinsburg it gets a lot rougher.

As such, I keep them in one account and just track any deductions with a spreadsheet for each tenant. 

I would go a step further and ask about their funding times, process, and track record.

From what I hear it is low, but still there.Keep in mind your loan will likely get sold, so you need to do more due diligence other than what a loan officer is telling you.

If your exemption is already in place, it's unlikely you'll lose it unless there is some reason for the Assessor's office to look into your property.