I replace the Hasselblad plate with an A-S plate. It saves a bit of space and the cameras sit on a table a bit more stably, so I figure it is a better approach than screwing one in on the bottom.
Here's the ones I have used:
I have had Hejnar make me a custom modified plate from my SWC/M body (which you can now see as a product for him, the 903 has a different screw hole arrangement), so Chris is great at doing simple mods if the plates he has doesn't fit the camera you have.
As for tripods, I used to own a cheap tripod (Bogen), and it worked well enough for 15 years or so, but it was pretty loose and constantly required adjustments after it got older. It worked well enough for basic 35mm shooting, but when I moved to large format, it was clearly not stable enough and I bit the bullet and got a Gitzo.
That was more than 20 years ago now and that Gitzo (1348/1349 model) has been so good; durable, solid, stable, etc. that I easily see it as a "forever" tripod for me... so much so that I decided to buy a used second one because eventually, I figure I'll destroy the original one on a cliff or something and they are pretty inexpensive when you find one used. Plus, far more stable than needed for basic medium format shooting (except when shooting ultra long lenses maybe, but that is a situation for a dual tripod setup).
My opinion is that a quality product is worth buying as long as you aren't a "product of the month" kind of person. Buy a quality tripod once and keep it for life.