Yup, USA are certainly prepared for it, although there is the issue of Trump's travel ban to deal with.
Having worked for the Qataris the stadia construction projects are amazing, but there's little legacy benefit.
If FIFA are genuine about taking the WC to new frontiers, then Australia would be a logical choice, they bid for the and it would fit in with a summer tournament too weather-wise.
Yeah, I can't see international sporting tournaments going to the USA at the moment. If Qatar doesn't happen, I'm pretty sure that it won't be the US who benefits.