Are you not able to assemble the engine yourself?
That would save you quite a bit of labor cost . apart from getting heads checked and possibly machining work if your going oversized pistons then its not all that difficult to assemble yourself and change seals, o-rings, stem seals ect.
the only hard part i found was getting the ring gaps where the diagram said they should go.
snapped a ring to lol .
was probably a year and a half ago i rebuilt mine . Cost around $2200
with rs closed deck block, je forgies, acl berings, gen subaru metal head gaskets (VERY IMPORTANT) in my opinion.