Just to play the devils advocate here...
I have an ex stud male, who was housed in an outdoor pen with a neutered female for company. He was 4 when I adopted him.
Yes he was very nervous and very shy at first, and it took him some time to become comfortable in the house. I kept him confined to a spare room for a week or so, then started introductions. He had a high shelf he would sleep on top of in there and always retreated there if he felt anxious or unsure. He now has run of the house and explores every inch
I never once had an issue with him toileting inappropriately, he is fastidious with his litterbox. He has not once sprayed. He really loves my non bengal girl who also lives here.
2 years down the track and he is the most wonderful, loving, affectionate bundle of madness ever.
He took extremely well to a walking jacket and leash and we go out for walks. The only thing I would raise is that he is still highly territorial, if he sees outside cats he will attempt to attack them with all his might! Of course he is not allowed to, but I'm sure he would if he could.