Tons of information and experience at your disposal here.

I recently got a newer job and we have much more disposable income.

3) How much money do you have at your disposal?

. ($2500)We will remove and dispose of the 4 ton condensing unit servicing the 1st floor.

Originally posted by @Devin ScottI do not have any experience with this; however I do know that, down the line if you would like to dispose of one of your properties you will need to know your adjusted basis in the property to calculate your tax obligations.Therefore, you will be able to go to that property's account, basically run down the line items, and calculate as you go.

Do I send a certified letter giving them notice to claim or otherwise will dispose?

By their  nature that shows asset disposal under the 10 year mark generally from acquisition. 

I'll agree to use licensed folks for major work, but I'm not gonna pay a plumber to swap out a garbage disposal when I can do it (not that I do, I have my handyman do it, but you get the idea).

Like trim, paint, garbage disposal, toilets, faucets, etc.

I am very interested in using my disposable income to get into REI.