While its true that someone needs to do the things which you mentioned, basic protein expression and purification are standard skills learned at the undergrad level for biochem / molecular bio majors. Depending on the composition of the plasmids, it should be very straight forward, and presumably the manufacturer will also provide plasmid-specific protocols to help. An existing lab tech / lab member / the investigator themselves could quickly pick up this work, or a tech could be had for a lot less than 60 grand a year.