Does getting a debt consolidation loan mess up your credit?

whats the best place to get a consolidation loan for debts with fair credit ... i dont want to mess up my credit anymore please advise...how soon an i purchase a home after getting this type of loan? i would like a starter home soon im tired of paying rent i want to consolidate all my bills into 1 payment and purchase a home please advise on situation and suggest areas to move too... thanks