For a detached home needing updates, I would retain inspection protection. I would also keep financing and appraisal protections unless you can comfortably cover a valuation shortfall yourself. Make sure the contract clearly states when your deposit could become exposed and under what conditions...
I would not insist that a placement firm remain accountable for the property purchase closing unless that separate service is explicitly contracted. That risks paying for a vague all-in-one promise. I would insist on a named coordinator through lease signing and handover, plus written escalation...