I just googled ac drain line and a bunch of great photos came up and I'm sure they will be very helpful to give you a visual of whats going on and you can search more specific to what your ac unit is. 

In the meantime, I would try to find things to do around the property that are visual improvements.

so we can visually see what we need to do and how to free space or better utilize limited spaces in each unit?. 

That might be a big enough deterrent, unless you're confident in the numbers until 2029.Another point to consider is that lenders might be squeamish about those liens, and either unwilling to lend to you (or to your theoretical future buyer) or require some additional protection, through some personal guarantee or addition to their title insurance policy.You could try to keep seller on the hook for any costs related to those liens, but not sure she/he would be willing to do so.Good luck!

It's always exciting to visualize what a home could be when you walk into something that is really dilapidated.

the swing a dead cat visual really got me!

To protect your investment, I recommend installing a security cage that provides a physical and visual deterrent. 

Offer to treat again but I would visually inspect the house and see if there are any tell tale signs....Since your lease doe not state tenant will lose security upon breaking lease I am not certain you have the right to keep security....good luck,Chris

The meditation, visualization, and scribing part are an integral part of my day and really allow me to relax, collect my thoughts, and rejuvenate. 

It sounds risky but we did our part to visually inspect the properties prior to bidding.