Starting 3 year of ownership, Aircraft was maintained by mooney service center in denver for 15 years. I new there would be some catch up maintenance costs. Flight home from colorado, plane would not start after landing in pomona california, no indication of mag problems inflight or startup from previous leg. Overhauled mags, new wires and plugs $3500. Was on my list to do myself in the near future as mags were near the 500 hour mark. First annual with Lasar, base inspection $4500, catch up maintenance; new gear donuts, steering horn linkage rebuild, valve cover gaskets, exhaust gaskets, new o2 bottle, brake linings, 1 break caliper, 1 brake rotor, engine filters, elt battery. My dad and I did the engine work as they had 100% crew turnover, all with no experience with mooneys. Cost $12000ish. Annual august 2021, lone mountain aviation henderson nevada annual combined with engine work from losing #2 cylinder leaving henderson to Tucson in April. Replaced #2,4 cylinder with new, replaced engine mounts, pitot static test, and adjust engine fuel setup, otherwise a clean annual. total bill including base annual of $2700 out the door $11500. I am not impressed with the previous mooney center in colorado, there were maintenance items that should have been addressed. I purchased my plane right out of annual at the time. Some of the items I had planned to address to decrease the cost but the plane had other things in mind. I am otherwise very happy with the performance and feel I am turning a corner with catch up maintenance. Next year I may consider using top gun for my annual and us the IA based in rio vista.