Anyway, just keeping what land is not rented out and the buildings from degrading is nigh on a full-time job in itself; trenches need to be dug and maintained, forest kept at bay, houses painted, roofs mended &c.
I've much respect for anyone who decides to give it a go, but I believe your assessment is correct: It is an awful lot of work for little gain but subsistence, not leaving much time or money for other pastimes.
A couple of hundred years ago, the alternative to this back-breaking work might have been starving or succumbing to the elements.
Today, the alternative is just about any paid job, outsourcing all the backbreaking work to other, larger, more efficient units.
For most people, the choice is simple; for other, more adventurous people, trying out the lifestyle is tempting enough to actually go ahead and do it.
You've gone ahead and done it, found it not to be all it was cranked up to be.
Unless you find (or think you will eventually find) comfort and fulfillment in the work in its own right, I'd say cut your losses, find employment somewhere and try to use the lessons learned while homesteading to your advantage in phase II of your career in the big city.