I is very good that you want to live a holy life, a quiet life, a separated life.
I am sorry but, no, I do not believe you can be a monk part time. It is a life, not something you add on to your life. A monk is married to God. You do not get married part time. You do not join a family part time.
It is good of you to consider helping a monastery but usuallyan oblate does not live in the monastery. An oblate is associated with a monastery, lives by their rules in the world, prays their prayers, visits the monastery occasionally, but is not a monk. A monastery is not a special kind of hotel.
It sounds very nice, to go to a monastery a few days a week, enjoy the quiet and the prayers but you would not experience true monastic life, the same way you don’t experience married life when out on a date with a girlfriend. It is a commitment, of your whole self, forever, and the daily living out of that commitment in community, that makes a monk.
You could live a holy life in the world, join a secular order or become an oblate. There are cases of couples who have both joined religious orders full time after marriage or couples who have taken vows of chastity after marriage.
You could make your home like a monastery- remove all photographs and pictures from the wall, take down lace curtains and replace them with calico. Wear plain clothes all the time, do not save good clothes for when you want them but commit to the way you want to be. Practice poverty in everything and be aware of every pen or scrap of paper that you waste. Throw out your sofa and arm chairs and sit only in upright chairs. Fast, eat simply. Commit to praying the full Office every day, not just when you feel like it, but also when the plumber is coming or when there is something else you want to do. Be ready to leave a cake to burn in the oven because it is time for Office because that is what you would have to do in a monastery. Do not watch television, not just when there is nothing on, not just the news, not at all. Throw it away. Do not read novels, only stories about saints, and those only on feast days or Sundays. Other days you are only allowed to read theology. Do not listen to the radio. Do not sing while you do the dishes- this is part of the rule of silence. Do not chat or just mention something to your wife. Save it for the 45 minutes a day you are allowed to have recreation or conversation.
This is all from my experience of being a contemplative nun in a monastery. This is what life in a monastery (superficially) looks like. It isn’t a vacation.
Life in a monastery isn’t easy. It isn’t supposed to be easy. It is supposed to make you die to yourself. Dying is not something you do part time.
Life in a monastery is worthwhile and it is a beautiful life but it isn’t easy. It is a life, not a hobby.
Also consider the effect your desire would have on the other monks. They require a stable community, not one where people come and go. I was sick at one stage and had to leave the monastery to go to the doctor. Every time I went it was a disruption to my life, and that was a negative effect from just leaving the monastery for an hour. Most enclosed nuns would agree that just visiting family in the guesthouse, talking with people outside, spending a few hours with people from outside the monastery, had a detrimental effect on their experience of monastic life. There is a reason why only senior, stable monks are allowed to go to the guesthouse. Your visits for a few days each week would disrupt their lives.
It wouldn’t be real for you and it wouldn’t be fair to them.