You may hit a roadblock as the sales contract may require that any inspection be performed by a "licensed home inspector" not a general contractor. Its just another siphon in the residential real estate pipeline.
Many GCs are licensed home inspectors because they give free estimates all day so they may as well get paid for a few of them. A lot of people buy homes then immediately get work done and if you're not an obvious scumbag the fact that you've already conducted one transaction with the new owner will not hurt you.