Bottom line in MANY other professions you are expected to travel in a responsible, cost effective manner. Sure, that might mean not sharing a room if you are someplace that isn't as expensive as SA is for close hotels.
And while you want to act like education should have a blank check you are working for tax payers. Only the federal government gets to spend like they have no budget. As a taxpayer, I want accountability for those funds coming out of my checking account. Like it or not, education has a finite budget so until you find a way to fund it, (maybe Mr. Gates could leave a few billion dollars to fund Texas schools since he isn't leaving it to his kids), we MUST be responsible with those funds DELEGATED to us FROM the taxpayers in your district. Many of which don't even have kids in school!