Securing a basement suite with door to main floor

Try this door wedge for when you’re home:

https://www.amazon.com/s?k=door+wedge+stopper&sprefix=door+wedge&ref=nb_sb_ss_i_2_10

Try this for when you are away. It’s a hassle for you to install each time you Leave:

https://www.amazon.com/Defender-Security-Lock-Out-Diecast-Construction/dp/B00CGYNFF0/ref=mp_s_a_1_7?dchild=1&keywords=door+lock+out+box&qid=1592690322&sr=8-7

Or this type when you’re away:

https://www.amazon.com/August-Wi-Fi-Smart-Generation-Silver/dp/B082VXK9CK/ref=mp_s_a_1_8?dchild=1&keywords=door+lock+out+box&qid=1592690322&sr=8-8