The exterior of the duplex needs repainting and both the A/C condensers are completely unleveled on their soft pads from a rising root system from the tree in the backyard. 

First, let's say congrats on your success.You're missing the forest for the trees.

I recently visited Joshua Tree, CA and saw how well branded, beautifully decorated, and incredibly remote most of the properties are out there.

Usually the surprise come from unexpected , could be city code violation , tree falling , eviction cost or damage to something , in general put 20k for one of those thing

I am out of state, in california, and looking to connect with people locally and form a team because I see great potential for short term rental growth in the area, similar to what has occurred in the Joshua tree national park and smoky mountains NP areas.Timothy Doenges, I would also be very interested to hear your thoughts on what the local STR market is like/BRRRR potential if you have time.thanks in advance,Paul  

You can buy 600 filters for the same cost as one (premature) furnace replacement.We also use the inspection to do some tenant training based on what we find on how to maintain the house, the lawn, down spout extensions etc We might also order a tree trimming, weed&feed or re-seal the driveway.

Ideally, building would be done with the trees in the area if they are big enough.

I'm looking to house hack in a nice brownstone tree-lined block. 

For starters, what about your other expenses like landscaping/lawn and tree care, snow removal, vacancy loss, water, sewer, trash, gas, electric?

Near Joshua Tree national park