an acquaintance of mine just bought a B58 for around $85000 and put it straight to work on cross hire. it needs engines soon. he is a lame so most of his maintenance work will be at cost. what you are suggesting, is possible to do, if you have a very good understanding of the pitfalls. you are unlikely to have this if you are just starting out in aviation. you need to be doing more than 200 hours per year to justify your own machine. just spend the money on hire. all care no responsibility. i have owned and operated 3 aircraft commercially over the years, and have found that below 150 hours per year is not worth the hassle. thankfully, i manage around 500-700 per year. you do not need much to go wrong to end up with unexpected bills that you can't cover.
pm me if you want any actual real info for bigger (185-210) cessna single running costs.