If your setting up for the long term
A simple good 6" centre height Lathe is first {with 35mm bore}
then you can make things and mitre etc
then as $ are available, a mill
Lots of expensive mitring fixtures and tooling set up under a mill is only useful if you are making a few frames a week all year long
and you have a market to sustain that level of production
any thing else is being silly