Urgent - Gatlinburg - Sevierville- Well water and septic capacity questions

[Hanish Sampath kumar]

I am currently under contract on a 1-bedroom septic, 3 full bath, (has 3 full bedrooms with loft space) cabin near Gatlinburg. Priced at 740 K. plus needs 30-40 K to set it up and running as a STR. Talking to some local contractors they told me there were 700 plus cabins in that area last year ran out of water and had to spend extra on water to refill their wells. Also cautions me on renting this cabin as a 3-bedroom 3 bath as I may not have the water capacity and may overload the septic leaching field. I have asked my home inspector to check the water flow speed in the well and he has not noticed any septic defects (this has been only used second home not on a rental so don't know the true capacity for both systems). I calculated the ROI based on 3 bedrooms in that area if I cannot rent it as a 3 bedroom this deal will not make sense for me. Anyone in the area who have experienced similar problems please shed some insights on this specific situation.