@Denly0
Section 1 of the Residential Tenancy Act says:
"tenant" includes:
(a)the estate of a deceased tenant, and
(b)when the context requires, a former or prospective tenant.
There is no definition of a "guest". More importantly, section 4 says:
4 This Act does not apply to:
(c)living accommodation in which the tenant shares bathroom or kitchen facilities with the owner of that accommodation,
(d)living accommodation included with premises that
(i)are primarily occupied for business purposes, and
(ii)are rented under a single agreement,
(e)living accommodation occupied as vacation or travel accommodation,
SO, THERE IS NO CONFUSION BETWEEN A "TENANT" AND A "GUEST"
However, as Mr. Bumble remarked in Oliver Twist, "The law is a(n) ass." I would be extremely reluctant to rent to anyone for more than 30 days, particularly with the COVID-19 situation. I personally will not accept bookings for more than 28 days.
If the "guest" states that she is there for vacation that would be helpful. If she states that she is there because she can't find any other place to live, look out.
The law is generally on the side of the tenant. If a landlord proposes to make someone homeless, for any reason, the court is likely to decide that the landlord should bear the burden of housing this person rather than the State.
Please note that this is my personal opinion, not legal counsel, and that I am not licensed to practice law in British Colombia.