Control of underfloor heating in a summerhouse by Satel Versa Plus

Hi,
I have a holiday home with 6 loops of floor electric heating .
I'm thinking of buying a Versa Plus with ABAX, with INT-ORS and ATD-100 for heating control.

What I would like to achieve:
1. The ability to maintain a temperature of 5 degrees in two rooms, out of season.
2. The ability to remote increase the temperature throughout the house to 15 degrees to pre-heat the building before arrival.
3. the possibility of increasing the temperature (perhaps locally) to 22 degrees overnight once the fireplace and cooker have gone out.
Is this doable in this configuration?
Would it be possible to control (or at least turn off) the heating via SMS should the internet go down?

I'm currently using a Sonoff TH16 and I'd like to replace this because they sometimes go offline and require a reboot. And of course the risk of entrusting Chinese electronics for 10 bucks with the power of a few kilowatts while no one is home.

I believe that, as of today, no solution offered by Satel is suitable for friendly and comprehensive control of heating in the home. At most a function: if the temperature is lower (higher) than ... then switch on the output. And additionally, if, for example, the system is on standby, then keep the temperature at X level.
You cannot count on more features, even in Integra control units. A heating controller for PLN 500 will (imho) be more attractive for the user than control of heating from the Integra level (not to mention Versa...). If it is to be based on a control panel, solutions from the manufacturer Ropam (OptimaGSM and NeoGSM-IP control panels) will work much better here.