Installment Personal Loan

I have an opportunity to buy in to a gaming tavern. I am currently about $100k short and looking to take out an installment loan. My credit rating is around 725 Fico and i only have a home mortgage on my credit. The installment loan is over a 3 year period and the payment is $3k roughly. I have the ability to pay it off in 18 months. My question is how soon will my credit recover from the obvious hit it will take? Other than interest paid…is there a benefit to just paying the minimum?