Thirty two ft and 15,000 btu means it will be quite warm inside.
If yours has 50 amp it may be wired for a second air conditioner already and have place under the roof liner already to install one with usual things.
If not, if convenient for you have one installed anyway. Run it with a second 30 amp cord or fifty amp cord and do the conversion later.
Our Holiday Rambler came with one but was set up for two and it was 50 amp.
Our MH runs two big ACs on thirty amp, when we have to but use the microwave too and it sheds one ac.
Good shop will fix it right up and maybe not too expensively.