It would be difficult to provide a reasonable amount for annual repairs without knowing the size or unit count of the building, but I know if you had to renovate a unit or the building, the investors I work with use $120-150/sqft depending on the extension of the renovation project and how high-end finishes you would use.

Well worth the price.Here's a quick guide provided by the state of California: https://landlordtenant.dre.ca.gov/resources/guidebook/gb10_m... 

With your extensive construction experience, you have a valuable skill set that can be beneficial in your new venture.

also the garage .. its not impossible to find that setup but it is more rare. it pulls -$50 per car spot off the rent or -$100 with no garage. that's accounted for with the rental comp.As far as the rear access being make or break im asking you guys on that one. that's the part im not sure about. its an otherwise great deal except these cost cutting measures by the builder. i didn't notice this before walking it yesterdayIm afraid im falling in love with the numbers and these weird things with the property will attract a lessor tenant than i want to deal with and ill be stuck in a nightmare property like i hear about people falling into on accident because they thought the numbers on paper were so much better but the property was crap and nobody wanted it . that's what im afraid of i guess.i did do extensive research on this particular neighborhood so i am familiar with the stats and boots on ground type as i live pretty close about 30 min .

Do I have to get an extension from the seller?

Here are some stages and recommendations to help you through the process:Create an extensive business plan including all aspects of your idea.

I really appreciate the share.Buying that volume of Chicago tax liens has to be a good long-term play...I'd love to understand their strategy and thought process.For those who didn't want to do the math that is $4,000 per tax lien which just seems ridiculous lol I've done extensive modeling and work on this exact niche - Cook County Tax Liens. 

With my extensive knowledge and background remodeling and building new construction housing from the ground up, I could be a huge asset to anyone looking for a partner in the industry.

First you need to have extensive experience in deals to understand every risk profile as well as have the connections to find product to buy. 

I've seen extensive foundation repairs done to cinder block walls that are bowing from external hydraulic pressure, and they've been repaired with extensive steel beams, tension systems and a drain cut in for around $12,000.4" is a fair bit of slope and to put in floor leveler...well, that's a lot of floor leveler.