Visited Ciclismo RD ( Aro y pedal) today
Google map F854+MF Santiago De Los Caballeros
Small shop, friendly staff (one guy)
Not a big selection, but what they had looked like good quality.
He could also provide a used bike in the upper range if you want a MB with hydraulic brakes and not mechanical. Or sell an upgrade (shimano) 5k dop.
Had one high range 105k dop, one with mechanical disc brakes 23k dop.
Others with conventional brakes for less money. One road racer to, looked great.
Reasonable good bike for child's 3k-5k I believe.