Make a repair list before comparing prices
During a showing, separate visible cosmetic work from questions that need an inspection. Record the room, the symptom and the trade you would ask. A stained ceiling, for example, raises a question about the source of moisture before it raises a question about paint.
Use written estimates to compare the purchase price, likely work and time before occupancy with a comparable home in usable condition. Ask your lender whether the property condition affects the proposed financing. For a starting budget, see mortgage pre-approval.