This is the biggest misconception about experimentals and the biggest reason to buy one if you want to control maintenance costs.
Anyone can do the maintenance on an experimental aircraft. If you hold the repairman's certificate you can sign off the annuals. If you own an experimental and do not have a repairmans certificate you need and A&P to sign off the annual.
I find it amusing that certified owners will push the FARs way past the grey areas to do the work themselves and have an A&P buddy looking over his shoulder.
Do I care ? No, but why not at least look at airplanes where you can do all of the maintenance yourself legally. Anyone can do any repairs, maintenance, or overhaul of experimental aircraft.
You need to hold a repairman's cert or be an A&P to sign off the annuals.