*sigh* The joys of having an intact male ... sorry you are having to go through this, truly I am. I have a whole boy in my home too, my stud breeder boy smells horrible most of the time, bless his heart.
The only thing you can do is to confine him to one room in your home, preferably a room that is easy to clean, such as a bathroom, or a cage until you can get him neutered. If you cage him, you can wrap the cage with either towels or pee pads to prevent the spray from getting out. This will prevent him from marking everywhere in your home. I know it sounds cruel not to give him run of the house, but honestly, unless you want your house to smell like Eau de Stud Spray forever more, then you have to do it.
Once he is confined to an area where you can clean easily, you will need a black light to go around your house and see where he has sprayed. Once you find all the places, then you have to saturate those areas with an enzymatic cleaner such as Nature's Miracle (I like the Rug Doctor brand called Urine Gone myself), soak up as much of the urine with a dry towel or cloth as you can and then let the area dry. Then saturate it again. Blot with a towel again. Repeat until all traces (with the black light) are gone.
You will not be able to stop this behavior without neutering him. In fact, it will only get worse with time and the longer he resides with an intact female, the more ingrained it will become.
I know times are tight for everyone economically at the moment, but the only way to stop this is to neuter him. And even then, it isn't a guarantee. However, once neutered, it won't smell as bad. It will still stink, but not like it does now.