Is Zillow's rental estimate feature reliable for determine this? 

I am trying to find repair estimates for these items for a 1880sq Home cape style home. these are the items im looking to get a quote- Roof trims need repair–there are signs of seeping near the skylight windows second floor–adjustable lollies need to be replaced with cement lollies–garage is in need of foundation repairs.

(I am just asking since I have not managed to get a deal that good, and would like to learn/gain some new perspective from more experienced ppl, like how much cash-flow are those deals, how much downpayment/initial cost, how much monhtly estimated expense, etc)

I remember my mom telling me about a friend who was looking to sell her building and at first I thought the deal was to big for me; however, I looked at the location, ran the numbers, estimated repairs and the deal made sense if I factored in moderate rent increases.

The Replacement Cost (cost to rebuild) is harder to estimate than with a home. 

If you are interested, put in an offer that allows for you to have your contractors come in for estimates on remediation and repair.  

Meaning, if there are no properties in your neighborhood and surrounding areas with a finished basement it would be extraordinarily difficult to estimate any value from your basement. 

Next up I believe to make sure when you run your numbers you get an accurate repair estimate and ARV then negotiate the best price for you from there. 

But if you do then include the estimated cost of monthly utilities into your rent that these companies are paying.You can write that tenants should keep the AC at a certain level but there's no guarantee any of them will do this. 

., $500k property requires ~$2500 rental income to breakeven):Unless your rent is real high, the cap ex/maintenance will be significantly higher than you estimated.