Get a professional inspection.
I was very recently in the same position and inspected it with my renovator. Some issues have been uncovered during the renovation that would certainly have curbed my enthusiasm on the purchase and could have been used for negotiation leverage. I`ve had inspections previously and they follow a methodical, structured routine, testing all plugs, switches, appliances, and using strong lights, test meters etc. I can honestly say I made a mistake not getting it on this one, and it likely would have paid off several times over, fortunately it isn`t going to be overly costly.
I won`t make that mistake again - its the cost of doing business.
Ed R