If they are paying for hotels etc then there's no way I would charge them outcall rates on top.
People don't like feeling ripped off or taken for granted, you might find that some would feel that way which I think is fair enough.
Infact, it's not even their responsibility to supply you with accommodation to see them in. Could you not just get your own hotel room and see a number of clients per day or evening which will keep you afloat?
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