Just to give you an idea of what is involved to patch a few areas of a patio like we did, I'm going to give a little summary:
Twenty-five bags of concrete were needed for these two areas. One area was about 7' L x 2' W and the other was about 7'L x 7'W.
Steve and I made a few trips to Home Depot and Clark Devon for concrete bags as we didn't want to overburden our car with all that weight (not a good idea).
Since we didn't realize when we planned the project just how many bags it would take, we had decided to not rent a mixer and instead mix it all manually using our brute strength (free advice: Do not do this). We took turns. Steve would mix while I used the hose to add water and then the reverse. It pretty much took all day on a Saturday, but we finished in one day. And it whooped us good- we were fairly useless and cranky the rest of the weekend.
Next spring we are 90% sure we will have a new fence on the north side of our yard put in (we will probably do ourselves in a few weekends) and after that I can finally plant more trees and shrubs and implement more of my landscaping plans. But for a new patio, we will probably wait until we get a new back porch.
In these parts (Chicago), a 2-story enclosed deck built to the new Chicago codes would run us about $20K- not exactly small change. (This price includes the tear down and removal of the existing back porch.)
We have time to plan and time to consider our options. Lack of funds gives one time to ponder. And in the meantime, we at least have a usable patio. As I said, it'll do!