Construction costs vary regionally and from your description the scope of work is not well defined. Ask a couple local builders to come look at your project and advise you.

I have cracks to my fire pit that's finished with smooth stucco. Any suggestions on how to repair this?

Ok, here's an industry publication with a detail for stucco over a roof. It's the second diagram in this pdf: https://stuccomfgassoc.com/staging/wp-content/uploads/2020/06/wall-to-roof-deck-flashing-11915.pdf I would probably try to get a counterflashing profile with a drip edge to go over step flashing tied into the roof system, but this particular detail doesn't include it. Either way, this should give you a good idea of what you're up for. Edit: just realized you have a metal roof, so instead of step flashing shingles, go for an L -profile (ie 90 degree)

Hello! I had some exterior (pebbled) stucco repair work done on my house, and thought I could handle smoothing just 2 sides of these 2 porch post/pillars myself. These were not touched y the plaster guys. Would it be best to try either the Quikcrete fast-setting concrete or the Quikcrete Stucco patch product? Thought I would first scrape it relatively smooth, the apply either product and smooth. Thanks for any suggestions / advice!