Diesel, unless you've been 100% with every single fish in your frag tank, it's not a great idea to observe multiple fish in a frag tank. All it takes is one fish to contaminate that tank and it's dirty. Why tank that chance.
All the money you spend on a nice system, you should invest in a QT tank. If it gets dirty, you just drain it and clean.
Keep your clean frag tank for that stunning fish, emergencies, or anemone acclimations.
Seriously, TTM is super easy and anybody can do it.
The best way is to setup a four tank system. You can do a tower or horizontal setup. Aquaclear filters or Small powerheads. I like small powerheads and small heater. Three days in fresh saltwater doesn't do anything to a fish unless you're feeding them. You can feed on the third day/ transfer day. I haven't ever had a problem with a fish or lost a fish during TTM. No medication, no worries.