Interesting premise to attach transfer fees to a sport which traditionally does not have it (the unknown appearance fees avenue, aside).
But, if the creators have done the statistical balancing correctly, it should be fun - that is, ensuring, as in computer games, that none of the ATP or WTA players are 'over-powered', and thus become essentially required picks in order to have a chance of succeeding.
Having heard tales from friends about how managing their Football/Baseball/American Football based equivalents, have become all-consuming obsessions in their lives, I'm going to steer clear.
Best of luck to all participating.