I am paying a bill for a rental house for part of the summer for approx. $10k. I have the option of paying by check or using my cc for which they charge a fee. The fee amounts to 1.7 cents per mile if I use my Chase Sapphire Preferred card and get double points for travel which I will then likely use on United. I usually redeem my points for either premium seats or economy tickets north of $500, I'm on the fence about whether it's a wise move as I don't usually buy points/miles. Opinions?