I have nothing specific to say about those tires, but if you're on a budget you shouldn't be looking for folders.
If you want cheap, look
here:
Least expensive way to turn it into a fixie is to "suicide" it. This means you simply unscrew the freewheel(which you most likely have) and just put a sprocket on there instead. Use a bottom bracket lockring and red loctite to hold it in place. Not advisable if you plan to rely on back-pressure braking, but is OK for forward pedalling and rim brakes.
Otherwise get one of
these fore example.
Or get a flip-flop hub and have it built into your current rim (if it's doing OK), or into a new rim.