FTG Limit

[Lightning Release]

Actually Minato uses the LEAST amount of chakra when he's using FTg for himself, via the seals on the kunai. Using a teleportation seal for the TBB uses more chakra, and teleporting the kyuubi. He has large reserves.

 

[Lightning Release]

unlike Kamui users, Minato isn't able to stay in that "dimensional void" you call, so he can only "enter it" whenever a "destination mark" calls him. which is the same as reverse summmoning.

How is a destination mark calling HIM when he's the one that PLACED the mark in the first place, for HIS use???

 

[GucciSinclair]

FTG has no limit....
tobirama's s/t had the limit of maybe 20-30 times a day.....because it consumed chakra like what you've said...
however, minato improved the s/t tech using seals, due to which, hardly any chakra was utilised for teleportation......which makes it easy to spam FTG...
remember, when minato blitz'd the entire army during 3rd ninja war, he'd have to use FTG for EVERY enemy ninja... & certainly there were hundreds of them, so he used FTG that many times......

if there is a limit on a version of FTG, it would more likely to be on Minato than to be on Tobirama, because Tobirama is a Senju.
and FTG does have a limit, it's shown when Minato got exhausted for teleporting the Kyuubi

 

[GucciSinclair]

How is a destination mark calling HIM when he's the one that PLACED the mark in the first place, for HIS use???

that's why it's called reverse summoning.