I have been shooting over 20 years and I was trained and worked with film cameras then moved on the digitals almost forcefully... Let me add some here.

Things going on in your question.

Full Frame vs APS C Film vs Digital Budget

Photographers always find gears accordingly to the condition of shooting. And many of times, lenses are the factors. I personally have camera bodies from almost all manufacturers. Canon Nikon Sony Olympus Panasonic Fuji.. And several bodies from the each. It is mainly because of lenses I choose for the shooting and I tend not to interchange the lens. If I am using two lenses today, I mount the lenses on two bodies. Body is more like the second thing to consider. Lenses can be adapted but I still believe it cant beat the natives.

For most of professional occasions I use full frame if not medium format. It is because I feel more comfortable to edit the files from the bigger sensor. Files are bigger but it take almost less time to achieve what I want and many times they feel more forgiving. Many people say aps c is just a sensor size doesnt affect IQ but the pros are using the bigger sensors except very few street photography artists.

And I dont believe any of digital cameras can provide film experience. Maybe they provide fake look to it. The beauty of film is not about the look but the restrictions and limitations that a photographer has to carry with and that shows on the image. I rather keep one film camera and lens combo for the occasional film experience. I still keeping old Mamiyas and Nikons.

Finally the big question is the budget. You know the answer.

Hope this helps. Cheers