Installing Win7 X86, X64, Win8.1 X64, Ubuntu & FreeBSD with each other

Hello all,

I'm going to install Windows 7 X64, Windows 7 X86, Windows 8.1 X64, Ubuntu and FreeBSD all on my PC! I want to dedicate one separated drive for each OS. May main OS for daily working will be the Windows 7 X64. I have this purpose because I like to work and be familiar with all of those OSs. I don't want to use the virtual machines for that because I want to utilize all of the PC power when working with each one. Any one will be selected from boot (like dual boot).
What's your opinion on this case? And which one should be installed respectively?
Thanks.

You can skip Windows 7 X86 - it's the same as the 64-bit version.

No I can't because sometimes I need to try some tool in both 64 & 32 bit versions.

And about the order. Which one should be first and what next? I guess this order:
FreeBSD then Ubuntu then 7 X86 after these 7 X64 then 8.1 X64. Is it correct?

And also I want to install each one inside the windows environment (not from boot menu), that is, now that I'm running 7 32-bit (on C:\ drive), I try to install the FreeBSD on the D:\ drive after that I install the Ubuntu on E:\ drive (also from Win 7 32-bit environment) then install the 7 X86 on F:\ drive after it I install 7 X64, this time from boot menu, on C:\ drive, and then after restarting into 7 x64 I install the 8.1 x64 G:\ drive. Is it true?

No reply!?