Looking to install a Mini Split AC in the house. I want to buy units and supplies and do most of the installation. I just need a certified guy to hook up the two line sets to the indoor and outdoor units, (4 flared fitting). Do a nitrogen pressure test. And do a vacuum. Any recommendation to contact. Local contractors want to sell the units at a $2000 more than I can buy the units at $3000 and charge an hour rate. Maybe the price of living in a small town.