While as you found, and I too, that life as a single mendicant is much simpler, so I recommend it if possible; however, once we have children we have responsibility for them, so we should learn to balance a contemplative life that seeks depth with responsibilities.
I found I could maintain depth in meditation by making sure I started and ended every day with some depth in meditation. Nonetheless, if you want a happy married life, which is needed if you are going to remain married, then you have to be able to provide sex for your partner. But, you could also inspire your partner to join you in meditation that seeks depth, but should not require it.
I found withholding sex was not necessary for depth, as long as I could maintain the depth on a consistent basis.
In Asia, it is common practice for the father to pass the family business onto his children when he turns 50. So, if you can provide the
necessary support for your children to negotiate a successful career, and to become stable in it, before you retreat into the interior life,
then you pass on to your children a sustainable contemplative lifestyle.
Thank you for posting your inquiry here. I hope others can benefit from this discussion.