They required a photo of my entire interior stairway to see if it had a handrail. 

. #3 $2500 for painting (assuming interior) is incredibly low unless you're doing the work yourself.

Then if you are only looking for cosmetic flips then you limit your targets and increase competition because every wannabe HGTV, realtor, interior designer, contractor, handyman is looking for the same easy flip.Its doable but lots of strategy and organization, hustle. 

He earned quick money as a wholesaler, and I have a house to keep)Rehab cost: $20k (vinyl floor, interior paint, new dual pane windows, new toilets and bathroom vanities, lights, new landscape, new AC condenser, all done by handyman, spent some extra money for minor plumbing and electric jobs, hydro jet sewer lines, clean up attic (had mice), added some insulationTime spent: 3 weeks (two handymen for the first two weeks, one for the last week)Value after repair: probably around $440kJobs still need to be done later: some dryrots, roof work (it's tile roof, roof doctor quoted me $9k, handyman said probably $5k, home inspector said $15k you can get a new shingle roof.

Hi Rene,I have received four quotes so far:First Quote: $90,000 ($273/sq ft) or $100,000 ($303/sq ft) as mentioned in the initial posting.Second Quote: $92,000Third Quote: $158,290 (Including Interior Design)Fourth Quote: $140,000 - $150,000I plan to go with the first quote/contractor, as they've previously done renovations in the house, and I appreciate both their communication and work quality.

In your contract/leases have you noted the right to have interior inspection?  

They occupy a property 60-70% of the time , nights booked per year and are not in the property most of time while on vacation.Set your mind at ease by triple net leasing your property( leasing company pays for furniture, RE taxes, insurance and interior maintenance.)

Is that interior lot line assumed when a duplex is built, or is some kind of formal process needed?

I have never had to do a full gut on a home yet, mainly just flooring, paint, appliances, and interior work.

We needed an upgraded 200amp electrical panel ($5-8k), extended water and sewer for the garage ($5k), built out interior ($7k?)