Is it possible to integrate with the key programming service for hotels?

apparently this is the api https://saltoks.com/developers/connect/welcome
is it possible to file the integration? how many + - in time?

Well, there are about 70 api methods, on average from 3 to 10 hours per method. Those. from 200 to 700 hours. But it’s not like you’ve been working for the first day, you must understand that you can’t evaluate "integration with the ISS", you need to clearly write what you want. What should we send there, when, where to get it from? What do we need to get from the api, where to write it, how often, what will you do with it later?
ps this is the same as what I would write to you, that I have a business for growing sunflowers in greenhouses, how many hours does it take to set up for all this to work in a box?

What do you need
1) program the card (room key) when checking in
2) block the card (room key) upon check-out
3) view the number of programmed cards (keys)
Need it for the first time

As far as I understand, one request is needed for the first item, and one request per stage is also needed for the second item. On the third point, it is not entirely clear where and in what form you want to do this.
If, for example, we take the id of the card and the id of the number from the additional fields of the order, then 1 + 2 actions will take 20 hours together.

thank you