I would say this warrants more investigation It does depend on the airports you will be laying over in, but usually, it is possible to find a quiet, yet interesting spot to while away the hours and most main airports have "pay per use" CIP lounges, where you can get a shower and freshen up, which are not going to work out much more than what you are budgeting. I would say it is worth it to look at which airports you will be spending the most time in before doing this. If you can be more specific about which airports you will lay over for more than say, a couple of hours, then I am sure there are guys out there who can advise.