My twins are now 5 but they were exclusively FF from roughly six weeks to one year. I started out using Similac Advance With Iron and Playtex Vent Aire bottles. My lifesaver was a bottle drying rack and a dishwasher basket for the nipples and little vent disks. I didn't use a bottle warmer at all, I just used room temp tap water and made bottles one by one (or two by two if they were both hungry at the same time). For the middle of the night feedings I kept a formula container and a prefilled bottle on the bathroom counter. I shook out the formula into the bottle then shook to mix. For outings I used the same formula container and brought either prefilled bottles or a bottle of water for mixing. I later used the same container for cheerios and other finger foods on the go.
Some people swear by mixing up a whole pitcher of formula in the morning and keeping it in the fridge. The one by one method worked better for me and I didn't have to fuss with warming a bottle and making sure it wasn't too hot. When my babies were about 8 months old I switched to half Kirkland Signature (Costco brand) formula and half Similac, then gradually got them on straight Kirkland Signature. We never had any tummy issues related to formula or bottles.
I never did bottle propping, somehow I managed to feed them both at the same time by propping them in the Boppy in my lap. I preferred to hold them in the cradle position for feeds, but if they were both hungry at the same time that wasn't possible and the Boppy worked well.
I hope that helps!
ETA: As far as being supported in formula feeding, it wasn't really an issue for me. Nobody has ever said anything negative to me about it, if someone DID ever say something to me I'd probably let them know that how I feed my children is none of their damn business.