If you're worried about bass and dogs (as I have my 3 little dogs with me every night in my theater), a really good solution is to make sure those subs are firing directly into your seating. Like if it could literally be behind the couch firing into your back or build something in the floor under your seat firing up into your seat (or just get shakers). The tactile feeling and close proximity to you will let you lower the bass but feel the same level or even higher level of satisfaction.
As far as one or two subs, people dont usually get 2 subs to add more bass. The 2nd sub only adds 3db. They get 2 subs to avoid room nulls. If you follow my advice and have the subs originate basically at your seating position, then room nulls are a non issue as the bass originates in your position.
Video: JVC RS4500 135" screen in pure black room no light, htpc nvidia 1080ti.
Audio: Anthem mrx720 running 7.1.4, McIntosh MC-303, MC-152, B&W 802d3 LR, B&W HTM1D3 center, B&W 805d3 surround, B&W 702S2 rear, B&W 706s2 x 4 shelf mounted for atmos, 2 sub arrays both infinite baffle: 4x15 fi audio running on behringer ep4000 + 4x12 fi audio running on 2nd ep4000.