SMP 2 has the most votes! *clap clap* All future updates will be posted herehttp://empireminecraft.com/threads/metron-towers-mega-mall-hotel.32454/
Smp 2 only has one popular megamall, 4005. It's rarely in stock, yes i know its hard to keep a mall in stock, a hotel is something new on the empire, I think smp 2 is just the server for it, may attract more players to smp2. If you need reses with that perfect address, I know some great ones. I'll tell you in pm.
Smp3 is basically abandoned. I think it would be the best place for it. And an awesome thing about it is that you could get an awesome res number as 75-80% of them are derelict
SMP 9, as it holds the new super project under the name of ''The Colossus Spyro Towers'' which covers a 3 wide 4 long residence block
I would say SMP3/SMP6 for a mega mall cos they are both pretty abandoned (but if you did set up on SMP3 soon you would have to compete with me). For your hotel I would choose a server with a low amount of open residences, like SMP1 to max out your guests.
I would like youre mall and hotel to be on SMP3 simply because you can choose were to build it and when you made something epic more people will consider smp3 to be there new home server, means that when you ar edone smp3 will get more people on it agian (if needed i would love to help building)
Smp3 you will have good luck getting a good res number! Also if your shop is well orginaised and stocked people would go there from other smp's