I would not get an attorney involved unless you just want to prove a point. it will probably cost you a few thousand and I am sorry but the attorneys involved  , your attorney and theirs will settle out of court. 

In the end, there could be a cost to any way you sell the home, I would just look at all options to see what fits your needs the best. 

They won’t give me just a quote for what it would cost for the same work in the first estimate.Am I obligated to replace or repair the AC?

Hands off ADU addition will cost significantly more than $100k.  

Hi @Irving Rivera - I think the old saying that "You get what you pay for" holds true in real estate investing too.I think Chicago neighborhoods like Garfield Park are great IF you have the right team and MOST IMPORTANTLY THE RIGHT TEAM COSTS $$$. 

However, there is a tax deferral strategy that could accelerate your depreciation, keeping more money in your pocket today, known as cost segregation.A Cost Segregation study is an IRS approved federal income tax tool that increases near term cash flow by utilizing shorter recovery periods for depreciation to accelerate return on investment.

if your serious just send them progress not perfection is the key. get talking to people and see where you mess up then pivot and fix that screw up. if you are writing letters you are far ahead of many. i would also say to add about terms cash buy/no fees or closing cost/ as is/ and so on\.

Have you seen a positive impact in your STR besides the initial cost savings? 

Thanks  Juan, I'm just curious, what do you think the sheds will cost to buy, transport, set up, etc? 

A Local Realtor to the property can do a broker price opinion, cost varies.OR Pay for on of the 100's of AVM services