I don't think it could work, but that depends on your opponent and rulespack/missions.
My current tournament list:
CCS w/ 4 meltaguns, astropath
Vets w/ 3 meltaguns
Vets w/ 3 plasmaguns
Vets w/ 3 plasmaguns
1x Vendetta
1x Vendetta
1x Vendetta
2x LRBT w/ 1 dozer blade
2x LRBT w/ 1 dozer blade
1x LR executioner w/ plasma sponsons, dozer blade
Total: 44 models, incl 8 vehicles, 10 KP @ 1700pts
The BIG difference is that I have 3 anti-tank vendettas and I'm able to move my troop choices for shooting/claiming. You guardsmen are very vunerable and inmobile.
Your anti-tank comes from the demolishers. They blow up tanks for sure with 3 S10 templates and lascannons. BUT you can only target 1 enemy unit per turn with those demolishers.
I'd go a little easier on tanks and add chimeras to transport (meltagun) veterans and CCS. That would add even more hard hitting targets and add mobility. Vendettas would ofcourse also add options, but at a much higher price.
Greetz