I would politely request a commitment to a timeframe. 

Depending on what needs to be rehabbed the timeframe will change, but I would allow for more time on the market just to be safe.

I have an investor interested in your (older/further away/inexpensive) listing - (address). 

If the surrounding area has a lot of tear down and rebuild or there’s no inexpensive way to renovate to make it more functional, likely not worth sinking much more money into it if most future buyers will just prefer to tear it down.

To me, if you can only increase NOI 10-15% over the next 3-4 years it may not be a "good deal", but if you can increase NOI 30-50% over that same time frame you may have a "good deal" on your hands.

Most work this way: Rates: 9% to 13% (Most Deals are 11-12%)Terms: up to 36 Months (Most Deals are 6-12 months)Fees: 2-4 points(%) of loan amount paid at closing (Most Deals are 3 points(%))Minimum Loan Amount: $50,000 (For loans less than $250,000 $2,500 minimum fee)Max Loan: 65%-70% of After Repair Value(ARV)100% Rehab Financing Available (Require 20% of purchase price down payment or cross-collateral)Closing Timeframe: 48 Hours - 3 Weeks (Most Deals are 2 Weeks)NO PRIMARY RESIDENCES, NON-OWNER OCCUPIED ONLY, BUSINESS AND COMMERCIAL USE ONLY.

She told me just like this hire workers that do great work , have a timeline for the flip she said about 3 months is a good time another thing that I  found interesting if they don't get it done in that timeframe the lender charges them an extra 1500 each month until home is sold to get money back.

The one in the pic looks rather easy and sort of inexpensive to duplicate.

Most work this way BTW Rates: 9% to 13% (Most Deals are 11-12%)Terms: up to 36 Months (Most Deals are 6-12 months)Fees: 2-4 points(%) of loan amount paid at closing (Most Deals are 3 points(%))Minimum Loan Amount: $50,000 (For loans less than $250,000 $2,500 minimum fee)Max Loan: 65%-70% of After Repair Value(ARV)100% Rehab Financing Available (Require 20% of purchase price down payment or cross-collateral)Closing Timeframe: 48 Hours - 3 Weeks (Most Deals are 2 Weeks)NO PRIMARY RESIDENCES, NON-OWNER OCCUPIED ONLY, BUSINESS AND COMMERCIAL USE ONLY.

Grand Rapids City has gone from $200,000 to $317,000 in that time frame.