I have used mill-drills and combo machines.
For anything except very small jobs or things that a plain drill press could do, those machines will fight you.
The reason for a Bridgeport or clone is that they are rigid enough for bigger jobs, they are more adjustable and more easily adjustable and most of the cheap import tooling is Bridgeport size. A lot of that tooling is too big for a smaller machine so if you think you will save money with a smaller machine, you won't, you will probably spend more.
For anything except very small jobs or things that a plain drill press could do, those machines will fight you.
The reason for a Bridgeport or clone is that they are rigid enough for bigger jobs, they are more adjustable and more easily adjustable and most of the cheap import tooling is Bridgeport size. A lot of that tooling is too big for a smaller machine so if you think you will save money with a smaller machine, you won't, you will probably spend more.