I think I could readily get use to the upside down image but shifts, tilts, swings, etc may be hard to discern with an image in that position but, like everything else I'm sure it would take some practice.
It seems the larger the negative the more costly, not only the camera, but the accessories and most important, it renders my Besler 23CII useless. That requires another enlarger and being a Besler fan for decades I looked at the 45 MXT with condenser head(just like my 23CII) and that's about $2600 to get you started for printing-not to mention the necessary lens and lens board. A costly hobby. Probably in t he vicinity of around $5K(plus or minus) time you bought the camera, lens, and associated necessities, but; I'm sure everyone knows that. However, $550 for a CF is a great deal. I can't recall what my 23CII cost but, it seems like around $200-300 back around 1978 with the condenser head...precious memories. I've found over the years any hobby cans be as little as you want to get by on or can cost thousands. Depends on one's desires and wallet.
Best I recall, Zone VI Studios(Fred Picker?) use to have a cold light head for both the 23CII and 4x5 enlarger and may have sold the enlargers also. I suppose they, like Kodak, have gone asunder over the years but I would think that would have been the ideal head for 4x5.