Hey there,
I have solid experience with translation and communication.
I worked for five years as real time sport statistician via my cell phone for an Austrian company.
Apart from that, I used to be admin of a Facebook group that was selling betting advice and i did all the communication with the potential clients.
I also have experience with sales. In my portfolio, you can find a brochure that I created (copywriting, graphic design, product photography) for a Leading Bulgarian producer in the field of Cosmetics, Household Chemistry, Auto cosmetics and Innovations. I created a series of brochures for them. I am part of the sales team of the company now, as a freelancer.
To answer your questions:
a) Nothing specific. I work as a freelancer and do a lot of project, some for me, some for contractors. Some from home, some include travelling. Working hours are a subject of a discussion between me and you and depend on synchronizing me time and your nee)s.
b) Immediate in 75% of the case... the rest depend on a lot of things, which we can discuss.
c) same as b
g) Is the time per call /email initially defined as in the project info or do we count the seconds of every phone cal? (3 hours of work are 110 PLN)
But only if there are guaranteed 110PLN as a minimum per month, because I am not staying attached to a phone with the possibility of no revenue.
Good luck with your project!