Getting offers for things only two months away from the wedding!

No, not a florist. However my brother's wedding, his wife didn't think about hair and makeup so I was talking to my mom about it about 6 weeks before the wedding and it apparently slipped his wife's mind since she doesn't really wear makeup. I was maid of honor and my sister was a bridesmaid and we both definitely wanted our hair and makeup professionally done. When I mentioned that my brother's wife suddenly realized she also wanted her hair and makeup done professionally as well so I started researching places to go. Unfortunately, I couldn't find a salon that could accommodate my sister, mom, his wife, her mom, and myself so her mom and her went one place and my mom, sister and I went to another. It wasn't ideal, but we made it work and we all looked great! I don't think it will be impossible, but it will definitely be more difficult. My brother and his wife live in a small town which meant there were less options so depending on where you live you might have more options. One issue you could also run into is that a lot of vendors request elusive rights to be the only vendor to provide whatever service they offer so you might have to hire the new florist to also provide your bouquets.

Look on Thumbtack.com or Instagram. Most of those are lesser known vendors with more availability

Renting an arch from the florist will be less expensive. Also you don't save money by transporting/storing/reselling the arch or other furniture if you won't be keeping it.

We used Budget Bride for our fake flowers, which is always a back up if you can't find a florist on short notice.