If you take the hubs off yourself (not that difficult, actually fairly straightforward, and then take your new bearings and the hubs to a garage with a press, then it will only take them 10 mins to press old ones out and put new ones in, then put hubs back on yourself. My local garage only charged me a tenner for this, which with bearing being fairly cheap, you can get whole thing done for £50. They can be put in and out with a mallet and some correctly sized sockets or thick walled tubing, but I hate hammering anything like that, press makes it so easy! So reckon above is defo the best way to get it done cheap