Happy Holidays.

I need to control 4 motors and about 10 solenoids and also have a 2 or 4 line
LCD and a number key pad as user interface.  2 of the motors must be stepper
motors (peristaltic pumps) and the other 2 controlling x,y movement can be
steppers or servos. I was planning on using modified RC servos with a 10 turn
pot for the x,y because they are cheaper than stepper units.

I need help with the following:

Could a PIC handle all this and if so, which one would be best suited?  I have
very limited experience with the 16F84 only.

How stable and durable are the 10 turn pots realistically?  Will they break or
drift after a few thousand cycles?  If they drift, how complex would it be to
design code that will initialize the 2 servos to a predetermind point and then
go from there.

Any help would be greatly appreciated.

Thanks.