I'm still using my old Huawei B252 with MTN LTE-A through vox and surprisingly pushing 100-150 mbps as a backup
It's not as simple on a mikrotik - you would need to use scripting or netwatch to do your failover checking. Unless you looking to do a manual failover scenario.
I must say I do enjoy my Baleno - although I wouldn't say its severely under powered, it could be better but it's still decent town car
My only complaint is the 37l fuel tank ;/
better than the renault kiger i test drove - real koo baked beans blikkie
Keep in mind its "up to" "best-effort" 100mbps and considering its LTE/5G expect it to be a bit all over the place.
Check for and Air fibre availability (Openserve/Frogfoot/Supersonic etc)
My advice is to try month-to-month first don't commit yourself to a 36-month contract
based on experience with Telkom....he would have to request if to be moved to prepaid once the contract ends and then do the transfer over to your name.