[bizaro86]

I have a somewhat unusual situation where I'm going to need to take some interior pictures of some real estate. In similar situations in the past I've hired someone, but that isn't workable for this specific situation unfortunately.

I'm hoping to get some advice on what to use for equipment.

Things I own now:
Olympus E-PL1 (micro 4/3 from 2011)
Olympus E-510 (dslr from 2007)
Samsung S23Plus (smartphone from 2023)

I don't mind spending some money on this to get better results, but would prefer $500 vs $1000, which I think takes buying a new mirrorless with wide angle off the table. Realistically spending a couple hours practicing/learning will be the biggest improvement (which I plan to do) but I'd like to give myself reasonable quality tools if I can.

In all cases I'd need a tripod, and I think if I go with the smartphone I'm going to try and buy a big flash as well.

For the cameras I have good flashes already, but only kit and zoom lenses, so I think for them I'd try and buy a good wide-angle lens.

Any thoughts on the best bang for my buck here? Things I'm completely missing? Resources that will help me become a C- level real estate photographer in only an hour of study? All appreciated!

Edited to add: I'm hesitant to spend much on the E-510, I feel like micro 4/3 is more still around so at least if I bought a good wide angle and liked it I could separately upgrade the body later.