Yes, definitely.

An aspergillium and/or bucket isn't too expensive.

As for using holy water reverently to bless objects and persons, that is PRECISELY what it is meant for. Think about it: when you bless yourself with holy water you're not invading the priests' office either.

You didn't bless the water; so don't worry about usurping the priest's role. In fact, you're not "blessing" anything per se (that requires speaking) but rather USING a sacramental with devotion as it was intended. By using holy water, you extend the blessing that the PRIEST used on the holy water, applying it to the objects/persons you sprinkle the holy water on.

You sprinkling your house with holy water (with an aspergillium) is about like Trad bishops making the consecration of Russia to the Immaculate Heart of Mary. They're not pretending it's the one Our Lady asked for (the Pope in union with ALL the bishops) but it's not a bad thing either. In both cases, you're doing your best, doing "your part". Likewise, you're not pretending to consecrate a building or even confer a formal (priest's) blessing from the Ritual Romanum upon your house -- you're just blessing a building with holy water. Not as good as a priest's direct blessing on your home, but certainly not worthless either!

As long as you're not going into business (like Ghostbusters, and/or "Pablo the Mexican") or doing something sacrilegious/irreverent with holy water (no squirt guns, water balloons, or super soakers, for example), you're fine.