I so hear you about hiring someone to do the heavy stuff. We did also when we had the new pool put in. That way the wallet took the hit instead of our bodies!!!
Okay here is a tip for you from me...................the area under the return and skimmer.........it is pore to water coming out from rain or such (PLEASE tell me you are hard plumbing it!!) Mark out a good amount of room from the wall out and to each side of the return and skimmer. Dig down about 2 inches, fill that in with gravel then put pavers over the gravel. Make sure they have a slight slope away from the pool. This will help keep the over flow water from washing out the sand from under the pool.
Make sure to put valves under both the return and skimmer. That way you all you have to do is turn the handle to keep water from leaving the pool instead of having to lower the water below them then having to refill the pool
Unions! Make sure there are unions on everything. That way if you need to service, remove, replace anything you can with out cutting any pipe!
Kim