Did I make a mistake with my YoYos?

I recently sold my 75G and upgraded to a 90 (The deal with DH is that I only have 1 big tank). Here is the current stock and I wonder if you guys think I have room for a shoal of YoYos:
Current Stock for 90 Gallon

4 Bolivain rams
6 false Juli cories
10- 12 melon barbs (active but peaceful)
6 congo tetras
3 Platy fish
1 adult male Bristlenose pleco (Aka. Mr. Grumpypants)
1 red "honey" gourami
2 Hillstream loaches (need more)

(Edit I have a planted tank which could also be a problem

My DH just purchased 7 tiny YoYo loaches. do you think I'll have room for their adult size?

 

Well, you have some fiah together that kinda need rather different water paramaters to thrive. But that aside, you have "room" the biggest problem i see outside of water compatibility is you would have lots of bottom dewlling fish competing with eachother.
The rams, loaches, cories, and bristlenose all take up the same part of the tank. And the rams and bristlenose are somewhat territorial

 

Well, you have some fiah together that kinda need rather different water paramaters to thrive. But that aside, you have "room" the biggest problem i see outside of water compatibility is you would have lots of bottom dewlling fish competing with eachother.
The rams, loaches, cories, and bristlenose all take up the same part of the tank. And the rams and bristlenose are somewhat territorial

yes, all those bottom-dwellers are worrying me. I'm wondering about what you think about the water compatibility though? I am keeping all these fish without a heater so its about 73 and I'm running a Fluval FX-4. I know the hillstream loaches like it colder though. Any other suggestions?
(Edit) that BNPleco is super annoying. but he usually hangs out in his log and I make sure he gets plenty of veggies. I may have to re-home him though.

 

I don’t have experience with yo-yo loaches. However, I am concerned as well about the quantity of bottom dwellers. In my experience Rams appreciate being able to retreat to quite corner from time to time and need to be able to sleep on the substrate without being disturbed. I also had 4 Bolivian rams in my 75 gallon, they were fine for a year then it turned into a battle royal, just keep an eye on them. My 4 were 2 breeding pairs though so that could have contributed to the stress, despite the tank being well planted.

Bioload-wise I’d personally skip the yo-yos and just add 3 hill stream loaches (no experience with these either but I assume they need a group of 6ish?). I would probably add 1 or 2 more honey gourami as well, mine are extremely social and it’s very fun to watch them play and explore together. My pair even cuddle up on a leaf to sleep, it’s quite cute.

However, I’m not sure bout temp compatibility for alll of these species, you may want to look into that more. Personally, I wouldn’t keep my Bolivian rams cooler than about 76F which is what I aim for in my tanks. So I do think there are some temp compatibility and possibly water hardness compatibility issues you need to address before worrying about the bioload.

 

I keep yoyo loaches, they're 9 years old now. The tank size isn't an issue at all, but I feel compatibility will be eventually. As others above mentioned that you already have some territorial bottom dwellers and there's some other issues that are better being seen to first.
Yoyos get pretty big (6+ inches) are extremly active and pretty boisterous at adult age. They can also be pretty territorial themselves (they are considered a semi aggressive fish) and become a bit stressful on other fish in the tank.
Yoyos ideally need compatible tankmates and can upset calmer, more peaceful species. Especially considering they will happily barge into a Bolivian ram spawning site to eat their eggs