I'm planning to buy one of their lots of 500 m2 but not sure if it's safe to buy with this company as there is no information or reviews in the web about Viventum or Sustenthabit which is the company behind this development.I gave the reservation fee but before signing the contract and give the down payment I'd like some advice.Any advice would be appreciated.

Ask for their advice on where to live that is safe and affordable.You don't have to rush into things. 

I would say if you don't know the area, you should check the eviction database for that street to see how often evictions occur, you should check crime on neighborhood scout or some other site, and you should drive by the property late at night and see whether you would feel safe getting out of the car.  

I really see Columbus Ohio as an extremely safe bet for the next 10-20 years.

You can't be too safe. 

There is no "safe" investment in the stock market, real estate, etc., but you have to roll the dice and get in the game.

I really see Columbus Ohio as an extremely safe bet for the next 10-20 years.

The charging of EVs at the Property is allowed but must be done in a safe manner to avoid electrical and fire hazards.

You can't really ever know when that is going to happen, but I would say it's safe to anticipate at least 3-5% appreciation a year over time. 

Aside from the umbrella coverage, you can do everything in your power to make the property safe.