You can zip through the modules you remember and spend more time on the modules that are a little hazy.

Create a whole battery of these types of questions and take copious notes.

Is this a module that exists?

A way to keep an eye on the property is to perform routine maintenance like changing the filter in the furnace (which a tenant will almost never do on their own) and changing the batteries in the smoke detector. 

It's all battery powered except for the base station which has a battery backup.

Oh yeah; put fresh batteries into the thermostat if they need these.It's a whooole lot easier to do these things when the units are empty than when you get a call in the middle of the night.Gail

If you haven't yet, be sure to check out the A Beginner's Introduction to Real Estate Investing (your question regarding finance is best explained in one of the modules) and The BiggerPockets Podcast.

Think marketing fees, credit card fees, house visits, toiletries between each guest, batteries, light bulbs, propane refills, etc.

I do periodic maintenance - like checking/replacing A/C filters, smoke detector batteries and any other routine maintenance.

I am not too familar with QB, but I would think that it should have a fixed asset module.