This place has many names.
Familiar. Safe.
He grew up in this house, he slept here (most nights) and all his stuff was here. Having the ecto-shield and all the defenses was... nice. Well when it wasn't used against him anyway.
Business. Dangerous.
His parents worked at home, basement lab, rooftop ops center, kitchen table. They invented all the gear he used daily, and nightly.
It was also the same gear he had to avoid.
And the portal? It was about as helpful as it was hurtful. Holding enemies and friends, it gave him his powers... maybe killed him a little.
But it was home and he couldn't imagine it any other way.