Where can I find cheap analogues of KNX devices?

Question

Do it yourself

In connection with the upcoming repairs, I thought about the automation system of a country house.
Basic requirements:
- Flexibility and versatility of the system. (I want a single infrastructure for lighting, heating and air conditioning).
- High autonomy and fault tolerance. (The absence of a single point of system failure - for example, a server).
- Possibility of gradual introduction and improvement of the system.
A system based on the KNX protocol used for industrial room automation is ideal for all requirements.
The main problem in this case is the price - for example, a panel for controlling a warm floor costs 2,700 rubles, and a two-gang switch is about 8,000.
In this regard, there are 2 questions:
1) Equipment compatible with the KNX protocol is produced by a large number of companies, maybe there is some budget line of controllers that I just did not find?
2) Perhaps there is some similar decentralized protocol for which the equipment is much cheaper?

Answer 1

If cheaper, then the Chinese HDL network.

Answer 2

A smart home has never been cheap, even if it's simple automation.
Decide on a budget (count the number of control points).
Decide whether the devices will be wired, wireless or combined.
Check out other security protocols and solutions.

Answer 3

There are no analogues of KNX. Either it is KNX or NOT KNX. The most affordable is probably Zennio (Spain).