Longterm planning of inevitable upgrade

So as i do research for my current tank i find a lot of things i would like in a bigger tank, that i am planning on getting when i finish college. a little under 2 years from now. Also as a stock and make changes to this aquarium i realize that preplanning is the best way to do this right. So i am going to use this thread to put down fish that i would be interested in in a bigger aquarium, as well as corals and inverts i would like to keep. This way i can eliminate things that would cause future issues.

Tank size: 120-180 gallons
Sump: Big as possible
Skimmer: Upgrade from Reef octopus 110 SSS
Heaters: 3-5 watts per gallon. Current 300 watt add 1-2 300 watt heaters
Tank controller: Reef keeper lite, Possible upgrade(apex)
Light: 1 Radion Xr 15. Adding another XR 15
Pumps: Replace current pumps with 2 MP 40's
Return pump: unknown

As for stocking i am gonna start making a list and put fish into 3 categories.
The order in the categories are currently of no concern.
1- Willing to design aquarium/stock around
2- Desired for aquarium
3- Stock if/only if do not interfere with other selections or fish i am debating on


1
Yellow tang

2
Mandarin Dragonets
Blue Caribbean tang
Powder blue tang
Achilles tang
Zebra Lionfish
Radiata Lionfish
Zebra eel
Foxface Lo
Pair of clownfish

3
Trio of Cardinal fish
School of Chromis
Dwarf Angelfish(heard they are less likely to nip corals in a larger aquarium) no reason to put names down if i cannot get them
Non reef safe wrasse(If other stock makes this possible IE no inverts because of the eel)

Edit: adding in a new section of Dream fish. The fish here are fishes that are expensive, hard to care for, or fish i do not know i can get.
Blonde Naso tang
Black tang

Corals I would like to be able to keep
SPS
LPS- Mainly Euphyllias Also Elegance would be cool.
Softies- Leathers and Zoas
NPS zone would be cool

Inverts
Clam
Anemone(that clowns will host)
Cleaner shrimps
Cucumber


I will not change what i am currently doing in my 60 gallon to plan for a larger aquarium. If necessary i will rehome some of my stock but i would like to keep as many as possible. also might set up a small tank(10-20 gallon if i have to give up one of the fish i have that i really like)
Current stock
2 snowflake clowns
1 Firefish
1 Flasher wrasse
1 Forktail blenny
1 Cleaner shrimp


I know a lot of my fish/coral selection are impossible to keep with eachother, that is the point of starting way early. Also i will update this as changes are made to my 60 gallon as well as in my priorities with this tank. The reason that the Yellow tang is the only number 1 priority is that it is how i talked my girlfriend into the upgrade plan(her favorite fish).

So if you have any suggestions feel free to help me out. Like i said this is long term planning so feel free to ignore this thread!