It’s okay to get lazy with your nutrition at times. Life can get in the way and not everybody is always necessarily willing to go the extra mile at a given point.
One thing I feel it’s important to stress is that if you’re planning for this to be a temporary solution, then really don’t make it permanent. Give yourself a deadline and do clean your diet up when you get there. Otherwise it’s too easy to slip into bad habits permanently, and the longer you’ve had a bad habit, the harder it is to get rid of it.
For example, if you choose to get looser with your eating habits for a mass gain phase, let’s say 4-5 months, then do make a point to gradually work up to being “stricter” once that phase is over. Don’t stay into “sloppy eating” mode forever.