HELP ME ESTIMATE IF I HAVE A GOOD DEAL .fix and flip wholesale

[Antoine Smith]

SO, this home is at the edge of a road, and it leads to a street full of new homes... homes behind this home AVG to about $260,000 ... The owner wants $55,000.. .. The thing is his home is the oddball around, and the homes behind have 4 bd - 3 bath or 4-4 1900-2800 sqft.. ... his home is older but its decent and the inside and kitchen wont need much work at all.. inclding floors are nice.. ..but doesn't even have central air, and is only a 2 bath, 3 bed with a 997 sq ft. ... how much would it most likely cost to build 2 bedrooms and 2 extra bathrooms..>???? is this a good deal to start with? should i move on? he's highly motivated to sell.. thanks