Priests don't make much at all. Secular(diocesan) clergy are allowed to own property, but any money they have is likely be from their pre-seminary lives or from an inheritance.
I don't remember if part-time work is expressly forbidden--Jesuits tend to have lots of priests with their own work--but you'll be a priest 24/7/365. There will be days when you're on call like a doctor for people on the edge of death. Any jobs will be "hobbies."
If after I am ordained, and something happens that changes my life, like me meeting a great woman, would I be allowed to leave the clergy and honorably attend church, or would I face a penalty, such as excommunication?
Laicization would be the only thing that would allow you to leave the priesthood, and the Vatican has been very stingy about granting such things in the past two decades.
I dobut this is true in fact, but your post sometimes sounds like you're placing conditions on what kind of priestly life you'd accept. If you really have all these "conditions" you need to have met, you need to reconsider whether you're really fit to adopt the *sacrificial* state of life that is the priesthood. A lot of this reconsideration can take place in the seminary, of course.
If you have serious trouble, theological or otherwise, with your bishop or your pastor or various other priests, you'll have to get over that right quick. Any clerical life is one of special obedience, and you can't obey easily if you're constantly hunting for heresies or liturgical missteps among your superiors. Likewise, you'll likely be serving with such bishops or priests throughout your life.
Are you in contact with your diocese's vocation office? I find it very odd that you come to FR for this kind of information. If you don't go through a religious order, you'll likely be applying as a candidate for your diocese.
You'll also need letters of recommendation from a few priests, and since you're asking about this on FR, it looks like you need to get to know some. They'd be better sources of information, too.
Anyway, the biggest Latin Mass community is the FSSP, whose seminary has a web site here. This is a fraternity and not a religious order, so I believe priests are under the authority of their local bishop and not an FSSP superior.
I don't find it odd. As a single male Catholic, I can tell you the second 'priest' or 'seminary' is uttered in the context of your vocation you're subjected to a stampede of priests, nuns, and devout ladies pressuring you and promising daily prayers for you etc etc etc. It's a much worse atmosphere than buying a used car, and imo not conducive to the proper prayerful consideration of one's vocation, priestly or otherwise.