At the now moment blockchain 6.29 GB.
Is it planned to connect to a remote node in the future, an light wallet option?
It would be very necessary and useful.
From Sumokoin.org roadmap:
First Quarter, 2018
Multi-signature + Lite Wallet
Multi-signature wallet implementation
Light-weight GUI wallet
So March is going to be a good month, then in Second Quarter of 2018 bulletproofs(It's going to reduce future blockchain size with 80%) is being implemented, along with a mobile friendly web wallet.